The android.calendar.ics.adapter has no gui of its own. If you open an event from the android calendar you can choose between "view event" and "send event to ...". If you open an event from file/attachment you get a prepopulated "add to calender-form".

Packages

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.